// Put make.conf under revision control# ci -i make.confRCS/make.conf,v <-- make.confenter description, terminated with single '.' or end of file:NOTE: This is NOT the log message!>> make.conf - custom settings for portage>> .initial revision: 1.1done // The file is now in RCS, so put it back in /etc for reading# co make.conf

Notice that make.conf is now under revision control and is read-only. To edit the file, you need to perform the following steps:

// Check the file back in and unlock it.# ci -u make.confRCS/make.conf,v <-- make.confnew revision: 1.2; previous revision: 1.1enter log message, terminated with single '.' or end of file:>> changed DISTDIR to use a drive with more space>> . done

This can be a tedious process so it's better to put all the commands in a script to do it automatically.